ESB-2018.1917 - Ubuntu: Multiple vulnerabilities 2018-07-03

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1917
                 Linux kernel (Trusty HWE) vulnerabilities
                                3 July 2018

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           linux
                   linux-lts-trusty
Publisher:         Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Access Privileged Data          -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-7757 CVE-2018-7755 CVE-2018-6927
                   CVE-2018-5803 CVE-2018-5750 CVE-2018-3665
                   CVE-2018-1130 CVE-2017-15265 CVE-2017-12193
                   CVE-2017-12154  

Reference:         ESB-2018.1576
                   ESB-2018.1549
                   ESB-2018.1028
                   ESB-2018.0533.2
                   ESB-2018.1915

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3698-1
   http://www.ubuntu.com/usn/usn-3698-2

Comment: This bulletin contains two (2) Ubuntu security advisories.

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USN-3698-1: Linux kernel vulnerabilities

2 July 2018

linux vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  * Ubuntu 14.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software Description

  * linux - Linux kernel

Details

It was discovered that the nested KVM implementation in the Linux kernel in
some situations did not properly prevent second level guests from reading and
writing the hardware CR8 register. A local attacker in a guest could use this
to cause a denial of service (system crash). (CVE-2017-12154)

Fan Wu, Haoran Qiu, and Shixiong Zhao discovered that the associative array
implementation in the Linux kernel sometimes did not properly handle adding a
new entry. A local attacker could use this to cause a denial of service (system
crash). (CVE-2017-12193)

It was discovered that a race condition existed in the ALSA subsystem of the
Linux kernel when creating and deleting a port via ioctl(). A local attacker
could use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-15265)

It was discovered that a null pointer dereference vulnerability existed in the
DCCP protocol implementation in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash). (CVE-2018-1130)

Julian Stecklina and Thomas Prescher discovered that FPU register states (such
as MMX, SSE, and AVX registers) which are lazily restored are potentially
vulnerable to a side channel attack. A local attacker could use this to expose
sensitive information. (CVE-2018-3665)

Wang Qize discovered that an information disclosure vulnerability existed in
the SMBus driver for ACPI Embedded Controllers in the Linux kernel. A local
attacker could use this to expose sensitive information (kernel pointer
addresses). (CVE-2018-5750)

It was discovered that the SCTP Protocol implementation in the Linux kernel did
not properly validate userspace provided payload lengths in some situations. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2018-5803)

It was discovered that an integer overflow error existed in the futex
implementation in the Linux kernel. A local attacker could use this to cause a
denial of service (system crash). (CVE-2018-6927)

It was discovered that an information leak vulnerability existed in the floppy
driver in the Linux kernel. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2018-7755)

It was discovered that a memory leak existed in the SAS driver subsystem of the
Linux kernel. A local attacker could use this to cause a denial of service
(memory exhaustion). (CVE-2018-7757)

Update instructions

The problem can be corrected by updating your system to the following package
versions:

Ubuntu 14.04 LTS
    linux-image-3.13.0-153-generic - 3.13.0-153.203
    linux-image-3.13.0-153-generic-lpae - 3.13.0-153.203
    linux-image-3.13.0-153-lowlatency - 3.13.0-153.203
    linux-image-3.13.0-153-powerpc-e500 - 3.13.0-153.203
    linux-image-3.13.0-153-powerpc-e500mc - 3.13.0-153.203
    linux-image-3.13.0-153-powerpc-smp - 3.13.0-153.203
    linux-image-3.13.0-153-powerpc64-emb - 3.13.0-153.203
    linux-image-3.13.0-153-powerpc64-smp - 3.13.0-153.203
    linux-image-generic - 3.13.0.153.163
    linux-image-generic-lpae - 3.13.0.153.163
    linux-image-lowlatency - 3.13.0.153.163
    linux-image-powerpc-e500 - 3.13.0.153.163
    linux-image-powerpc-e500mc - 3.13.0.153.163
    linux-image-powerpc-smp - 3.13.0.153.163
    linux-image-powerpc64-emb - 3.13.0.153.163
    linux-image-powerpc64-smp - 3.13.0.153.163

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to reboot your computer to make all the
necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have been given
a new version number, which requires you to recompile and reinstall all third
party kernel modules you might have installed. Unless you manually uninstalled
the standard kernel metapackages (e.g. linux-generic,
linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system
upgrade will automatically perform this as well.

- --------------------------------------------------------------------------------

USN-3698-2: Linux kernel (Trusty HWE) vulnerabilities

2 July 2018

linux-lts-trusty vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  * Ubuntu 12.04 ESM

Summary

Several security issues were fixed in the Linux kernel.

Software Description

  * linux-lts-trusty - Linux hardware enablement kernel from Trusty for Precise
    ESM

Details

USN-3698-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This
update provides the corresponding updates for the Linux Hardware Enablement
(HWE) kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 ESM.

It was discovered that the nested KVM implementation in the Linux kernel in
some situations did not properly prevent second level guests from reading and
writing the hardware CR8 register. A local attacker in a guest could use this
to cause a denial of service (system crash). (CVE-2017-12154)

Fan Wu, Haoran Qiu, and Shixiong Zhao discovered that the associative array
implementation in the Linux kernel sometimes did not properly handle adding a
new entry. A local attacker could use this to cause a denial of service (system
crash). (CVE-2017-12193)

It was discovered that a race condition existed in the ALSA subsystem of the
Linux kernel when creating and deleting a port via ioctl(). A local attacker
could use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-15265)

It was discovered that a null pointer dereference vulnerability existed in the
DCCP protocol implementation in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash). (CVE-2018-1130)

Julian Stecklina and Thomas Prescher discovered that FPU register states (such
as MMX, SSE, and AVX registers) which are lazily restored are potentially
vulnerable to a side channel attack. A local attacker could use this to expose
sensitive information. (CVE-2018-3665)

Wang Qize discovered that an information disclosure vulnerability existed in
the SMBus driver for ACPI Embedded Controllers in the Linux kernel. A local
attacker could use this to expose sensitive information (kernel pointer
addresses). (CVE-2018-5750)

It was discovered that the SCTP Protocol implementation in the Linux kernel did
not properly validate userspace provided payload lengths in some situations. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2018-5803)

It was discovered that an integer overflow error existed in the futex
implementation in the Linux kernel. A local attacker could use this to cause a
denial of service (system crash). (CVE-2018-6927)

It was discovered that an information leak vulnerability existed in the floppy
driver in the Linux kernel. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2018-7755)

It was discovered that a memory leak existed in the SAS driver subsystem of the
Linux kernel. A local attacker could use this to cause a denial of service
(memory exhaustion). (CVE-2018-7757)

Update instructions

The problem can be corrected by updating your system to the following package
versions:

Ubuntu 12.04 ESM
    linux-image-3.13.0-153-generic - 3.13.0-153.203~precise1
    linux-image-3.13.0-153-generic-lpae - 3.13.0-153.203~precise1
    linux-image-generic-lpae-lts-trusty - 3.13.0.153.143
    linux-image-generic-lts-trusty - 3.13.0.153.143

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to reboot your computer to make all the
necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have been given
a new version number, which requires you to recompile and reinstall all third
party kernel modules you might have installed. Unless you manually uninstalled
the standard kernel metapackages (e.g. linux-generic,
linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system
upgrade will automatically perform this as well.

- --------------------------END INCLUDED TEXT--------------------

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